리트코드 771번 Jewels and Stones (Python)

Problem

https://leetcode.com/problems/jewels-and-stones/description/

Solution

from collections import Counter

class Solution:
    def numJewelsInStones(self, jewels: str, stones: str) -> int:
        counter = Counter(stones)
        answer = 0
        for jewel in jewels:
            answer += counter[jewel]

        return answer

Reference

파이썬 알고리즘 인터뷰 29번